A young girl who is planning her upcoming wedding may have some trouble getting her mother to attend the ceremony - as she is marrying her father.

The unnamed 18-year-old is revealing all the details of her two year relationship with her father in an interview with Science of Us, from how they fell in love and the first time they had sex to what their plans are for the future.

And one of those plans she is very certain of - the two will have children.

The woman, who hails from the Great Lakes region, reconnected with her father when she was 16, this after 12 years of estrangement.

They had sex that week, her first time, and were soon dating.

'There's a reason I lost my virginity to him, because I'd never felt comfortable with any other man. It was insanely sensual,' she says.

'It lasted for about an hour and there was a lot of foreplay. We both had orgasms. We are so similar, so it's so easy to sexually please each other. For example, we both love neck-biting. I've never been in a more passionate, loving, fulfilling situation.

The two are not even hiding their situation, with many around them aware of what is going on between them.

The wedding has already been planned, and she will be telling her mother - after the two make the moved to New Jersey.

'We plan to move to New Jersey where we can be safe under the law, since adult incest isn't illegal there, and once I'm there I'll tell everyone,' she says.